Convert JSON to CSV
Convert JSON arrays and objects to CSV in your browser. Nested fields are flattened into clear columns and your data is never uploaded.
Drop your JSON files here
Up to 50MB per file.
Conversion Settings
Files never leave your browser
How to Convert
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Upload your JSON files
Drag and drop or select JSON files from your device. You can upload multiple files at once.
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Configure Output
Start the conversion. Crest Convert will prepare the CSV file using the appropriate format engine.
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Download CSV files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert JSON to CSV?
CSV turns structured JSON records into rows and columns that can be opened in Excel, Google Sheets, databases, and analytics tools.
Nested object keys are retained with dot-separated column names, while arrays are preserved as JSON values inside their CSV cells.
Frequently Asked Questions
Is this conversion safe?
Yes. This conversion runs entirely in your browser - your files are not uploaded to any server.
Will I lose quality?
The underlying values are preserved. Nested object keys become dot-separated columns and arrays remain JSON text inside their CSV cells.
Can I batch convert?
Yes! You can upload multiple JSON files at once and convert them all to CSV simultaneously. Download them individually or as a ZIP archive.
Is there a file size limit?
Since this conversion happens in your browser, the limit depends on your device's memory. Most devices handle files up to 50MB without issues.
Why convert JSON to CSV?
Converting JSON to CSV gives you broader compatibility and flexibility. CSV may offer better compression, wider software support, or features like transparency that JSON doesn't support.